It's great to see all those live shows made by active gamblers. The live shows on twitch.tv are fun to watch, here you can also see how other people play different games and gets inspirations about how to play but also what not to do.
Your right, it's alway fun to watch someone gambling live because you can see their reactions to einning/losing and you can also learn something from that like different strategies your should use or mistakes you should avoid when you are playing. Most streamers also offer free giveaways so you could also win some money while enjoying the stream.